Madden fell with horse Breitling LS. Both Madden and Breitling LS fell on course at the open water obstacle.

They were both quickly back on their feet after the fall and left the arena together after the incident. A doctor's visit determined surgery was needed.

Madden will undergo surgery Tuesday morning at the Hospital For Special Surgery in New York City to repair the fractured bone.

It is not known at this time how long Madden's recovery process will be.

“It’s unfortunate, but these things happen in this sport," Madden said. "I have a great string of horses with a hugely supportive team of owners, sponsors and co-workers behind me and have no doubt I will be back in the saddle soon,” said Madden.

Madden is a three-time Olympian and one of the most decorated riders in her sport.